Even though it's hard to spot halos on those scattered cirrus, we can clearly see rare halos with stacked pictures. Helic arc unexpectedly showed up twice before and after the noon. The display starts with a nice set of Lowitz and Parry arcs.
22° Halo and Upper Lowitz Arc4 Oct 2026, 10:25:49 to 10:43:16 · 35 stacks of 20 · the sun followed · USM 500 % / 50 px
Upper Lowitz Arc and Parry Arc4 Oct 2026, 10:25:49 to 10:43:16 · 35 stacks of 20 · the sun followed · USM 500 % / 50 px, then B−R
4 Oct 2026, 13:38:14 to 13:56:12 · Processed with Photoshop
Helic Arc4 Oct 2026, 13:38:14 to 13:56:12 · 36 stacks of 20 · the sun followed · USM 500 % / 50 px
Helic arcs are easier to see in the time-lapse videos.
Halo
When
Lasting
The display
09:48–18:36
8 h 48 min
Sun dogs
09:48–18:33
8 h 45 min
22° halo
09:50–16:10
6 h 20 min
Circumzenithal arc
10:09–11:30, 15:04–15:58
2 h 15 min
Lowitz arcs rare
10:10–12:11, 12:22–15:31, 16:19–16:30
5 h 22 min
Parry arcs
10:11–12:15, 12:49–14:41
3 h 56 min
46° halo
10:53–11:29, 11:38–14:48, 14:59–16:02
4 h 48 min
Parhelic circle
11:15–16:21
5 h 06 min
120° parhelia
11:18–16:34
5 h 16 min
Helic arc rare
11:43–12:09, 13:40–13:57
43 min
Wegener arcs rare
11:52–12:12
21 min
Also seen that day: Tangent arcs.
The halos of the day as they were marked on the camera’s pictures: a rare display. Times are local.
The weather over the camera hour by hour, as the model had it (ECMWF IFS 0.25°, from Open-Meteo). Cloud is drawn by height; arrows point where the wind blows, with its speed in km/h. Times are local.
